Field and laboratory work by a group of zoologists led by Omar Torres-Carvajal from Museo de Zoología QCAZ, Pontificia Universidad Católica del Ecuador, has resulted in the discovery of a new species of blunt-headed vine snake from the Chocoan forests in northwestern Ecuador. This region is part of the 274,597 km2 Tumbes-Chocó-Magdalena hotspot that lies west of the Andes. The study was published in the open access journal ZooKeys.
Blunt-headed vine snakes live in an area comprising Mexico and Argentina, and are different from all other New World snakes in having a very thin body, disproportionately slender neck, big eyes, and a blunt head. They live in trees and hunt frogs and lizards at night. The new species described by Torres-Carvajal and his collaborators was named Imantodes chocoensis and increases the number of species in this group of snakes to seven.
Snakes collected as far back as 1994 and deposited in several Ecuadorian and American natural history museums were also examined. The authors were soon surprised with an interesting discovery. Some individuals from the Ecuadorian Chocó lacked a big scale on their face that is present in all other blunt-headed vine snakes from the New World. Other features, as well as DNA evidence, indicate that these Chocoan snakes actually belong to a new species. DNA data also suggest that its closest relative is a species that inhabits the Amazon on the other side of the Andes.
'One possible explanation for the disjunct distribution between the new species and its closest relative is that the uplift of the Andes fragmented an ancestral population into two, each of which evolved into a different species, one in the Chocó region and the other in the Amazon' said Dr Torres-Carvajal.
Torres-Carvajal O, Yánez-Muñoz MH, Quirola D, Smith EN, Almendáriz A (2012) A new species of blunt-headed vine snake (Colubridae, Imantodes) from the Chocó region of Ecuador. ZooKeys 244: 91. doi: 10.3897/zookeys.244.3950
Pensoft Publishers: http://www.pensoft.net
This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.
Scientists circumnavigating the globe on a spartan racing catamaran will spend the coming year deploying drones to collect better data on plastic pollution
A patch of gold electrodes you can wear behind your ear for up to two weeks will track your brainwaves 24/7 and let you control devices with your mind
Scientists have peeked inside the brain of a man with tinnitus to identify the brainwaves that underlie the debilitating sensation of ringing in the ear
For extinct creatures like dinosaurs known only from fossils, it is notoriously difficult to differentiate the males from the females of a species because sex distinctions are rarely obvious from the skeletons.
The most complete genetic information assembled on woolly mammoths is providing insight into their demise, revealing they suffered two population crashes before a final, severely inbred group succumbed on an Arctic Ocean island.
More than 30 million crows fly around the country, but among all creatures, the birds may be among the least understood. Ben Tracy reports on new research into crows' brains.
Mouse study demonstrates method to target mutations in DNA inherited from mother
After consulting a "stud book," the Zoo brought a male panda's sperm back to D.C., setting an exciting precedent
Stegosaurs may have sported quite different shaped bony plates on their backs, depending on whether they were male or female, new research claims.
Targeting a protein that causes rampant growth of cells in retinal blood vessels could lead to new treatments for vision loss in older people